Patents by Inventor Kurt Alfred Hackl

Kurt Alfred Hackl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the preparation of pure (S,S)-N-(1-ethoxycarbonyl-3-phenylpropyl) alanine
    Patent number: 5756812
    Abstract: Process for the preparation of pure (S,S)-N-(1-ethoxycarbonyl-3-phenylpropyl) alanine,in which impure (S,S)-N-(1-ethoxycarbonyl-3-phenylpropyl)alanine is suspended in water, dissolved by heating to the boiling point and separated from insoluble impurities by filtration and the desired end product is then precipitated by cooling, filtered off and dried.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: May 26, 1998
    Assignee: DSM Chemie Linz GmbH
    Inventors: Kurt Alfred Hackl, Josef Schaller